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3 years ago

Os numeros 5, (3x-1) (3x+2) nessa ordem formam uma PA. Calcule o valor de x

Mathematics

1 answer:

Crank3 years ago

6 0

=9x^2+3x-2
hope this helps!

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Pls help! ill give brainless to the best answer !! what is 25% of 75? show your work.

Nana76 [90]

Answer:

18.75

Step-by-step explanation:

25% of 75 =

0.25 x 75 =

18.75

Hope that helps!

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3 years ago

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Which of the following is closest to the actual distance in miles?

forsale [732]

Answer:

DAMMIT I BIT MY FINGER

Step-by-step explanation:

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3 years ago

What is the value of the expression k – 14 when k = –17?

Vedmedyk [2.9K]

I hope this helps you

-14+?= -17

?= -17+14

?= -3

6 0

4 years ago

A standard piece of paper is 0.05 mm thick. Let's imagine taking a piece of paper and folding the paper in half multiple times.

tatyana61 [14]

Answer:

(a) $g(n)=0.05\cdot 2^n$

(b) $g^{-1}(n)=\log_{2}20g(n)$

Step-by-step explanation:

Part A

The paper's thickness = 0.05mm

When the paper is folded, its width doubles (increases by 100%).

The thickness of the paper grows exponentially and can be modeled by the function:

$g(n)=0.05(1+100\%)^n\\\\g(n)=0.05\cdot 2^n$

Part B

$g(n)=0.05\cdot 2^n\\2^n=\dfrac{g(n)}{0.05}\\ 2^n=20g(n)\\$Changing to logarithm form, we have:\\\log_{2}20g(n)=n\\$Therefore:\\g^{-1}(n)=\log_{2}20g(n)$

Part C

If the thickness of the paper, g(n)=384,472,300,000 mm

Then:

$g^{-1}(n)=\log_{2}20g(n)\\g^{-1}(n)=\log_{2}20\times 384,472,300,000\\=\dfrac{\log 20\times 384,472,300,000}{\log 2} \\g^{-1}(n)=42.8 \approx 43\\n=43$

You must fold the paper 43 times to make the folded paper have a thickness that is the same as the distance from the earth to the moon.

3 0

3 years ago

please help asap i’m about to give up on this entire assignment i’ve been on this same question for like 20 minutes now and i’ve

andre [41]

Answer:

C and D

Step-by-step explanation:

Area of the top section:

A₁ = x*(x - x + 3) = x*3 = 3x in²

Area of the bottom section:

A₂ = (x + 4)(x - 3) = x² + x - 12 in²

Total area:

A = A₁ + A₂ =
(3x) + (x² + x - 12) in²

Correct choices are C and D

8 0

3 years ago

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